package com.fan.reggie.config;

import com.fan.reggie.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {

    /**设置静态资源映射(原因：默认情况下只能访问/templates和/static文件夹下的Employee.java静态资源)
     * @Param registry
     * **/
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry){
        log.info("开始进行静态资源映射....");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
    }

    /*扩展mvc从框架的消息转换器
    * */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters){
        log.info("扩展消息转换器....");
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter =new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用Jackson将JAVA对象转成Json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到转换器容器中
        converters.add(0,messageConverter);//要把我们的转换器放到前面优先使用

    }
}
